This is absolutely what a ‘Smurf’ account is - someone who is very experienced or has a significant backing behind them accrued from other account(s) creating a newer account to pose as an inexperienced player in order to be matched with them. In World of Warcraft, a ‘Smurf’ is a character that you intentionally don’t let past a certain level and throw a tonne of gold and gear at so that when they come up against regular players that level they have an insane advantage.